Blender model won't produce valid stl for printing
2 problems I can see straight away with your model.
First off, the part &quot;base enclosure&quot; has backwards normals. This plays havoc with booleans when they get applied during export and with slicing programs. Pretty sure some of your boolean parts have bad normals also because when you apply all the booleans there are still many bad contiguous edges found by 3D Printing Toolbox. Selecting all in edit mode and SHIFT-N fixes that. Also, select all vertices and merge by distance has over 400 verts that are duplicates, also bad for 3D printing.
Second, your scene is set up to export 1000 times smaller than what you draw at. It's a common mistake when setting up for 3D printing. You need to change your Unit Scale to 0.001, then scale up your model by 1000.

After fixing these issues I could slice it with no problems in PruserSlicer.